Howdy! I want to build Pharo images using Nix <https://nixos.org/nix/>. On the one hand this should look basically like the Jenkins scripts, but on the other hand the build must run inside a sandbox that is isolated from the network. So I need to download all of the code that I need ahead of time because I am not able to contact Github, SmalltalkHub, etc, once the build is running. I am not sure how to approach this problem yet but I have a preliminary question. Is there an easy way that I could "recursively" download all the Smalltalk code (etc) required for an application onto the local filesystem, and then load this into a Pharo image that does not have network access? Concrete example - How could I write a Pharo script that downloads all the software required to install Moose in a standard Pharo 6.0 image? Then how could I load that into an image off the local filesystem? I feel like there should be a solution here, since Monticello seems to be able to cache packages locally on the filesystem, but I don't how enough experience to quite know how to approach it. If this is possible then the "utopian" vision could be to recursively download every Pharo package that exists, in every relevant version, and make them available in the Nix universe. This is what Nix does with Python, R, Emacs, etc packages. Or if this turns out to be difficult for some reason then I could perhaps build the Pharo image externally - e.g. on the Inria Jenkins - and then import that into Nix as an opaque binary. This is probably the simplest solution but it is not very appealing from my Nix-centric viewpoint because I won't have visibility into what has changed between one image build and the next. Feedback would be much appreciated! -Luke P.S. Screenshot from the Pharo part of my application that is starting to come together, visualizing Lua JIT compiler IR code to make it more understandable than disassembly listings: https://github.com/raptorjit/raptorjit/pull/63#issuecomment-310138536.